CN1540792A

CN1540792A - Method for making core of soft packaged lithium ion dynamic battery

Info

Publication number: CN1540792A
Application number: CNA2003101034261A
Authority: CN
Inventors: 载岳; 岳载; 其鲁; 晨晖; 慈云祥
Original assignee: Zhongxinguoan Mengguli Power Supply Technology Co Ltd
Current assignee: CITIC Guoan Mengguli New Energy Technology Co Ltd
Priority date: 2003-10-31
Filing date: 2003-10-31
Publication date: 2004-10-27
Anticipated expiration: 2023-10-31
Also published as: CN1266800C

Abstract

Method for producing core includes steps: lapping n pieces of identical positive pole and welding one end of n pieces of identical positive pole to a pole ear of positive pole so as to constitute group of positive pole; enwrapping n pieces of negative pole, including n-1 pieces of pole possessing same length and thickness identical to positive pole and one pieces of pole possessing larger width than width of positive pole and longer length than length of other pieces of negative pole; inserting blind ends of negative pole into between pole pieces of positive pole, and the longer negative pole is at outside; welding exposed ends of negative pole on a pole ear of negative pole; turning the longer piece of negative pole 180 degrees back to fit positive pole closely; winding width of core by the longer part of the negative pole so as to obtain core of battery.

Description

A kind of manufacture method of soft package lithium ion power battery electricity core

Technical field

The present invention relates to a kind of manufacture method of soft package lithium ion power battery electricity core, belong to the electrokinetic cell parts.

Background technology

The electric core of the present soft package lithium ion power battery of producing, two kinds of manufacture methods are arranged, a kind of is to use the monolithic positive pole, negative pole and barrier film three reel overlapping back and form, common name takeup type method, another kind method is with positive plate, negative plate and barrier film are cut into the approximately uniform a plurality of small pieces of size, and just at each, draw a lug on the negative plate, superpose in proper order neatly according to positive plate-barrier film-negative plate then, be generally called stacked method, the shortcoming of first method is that the internal resistance of cell is big, inapplicable high capacity cell, the second method shortcoming is the manufacture method complexity, be not suitable for doing jumbo battery equally, be not suitable for doing big capacity soft package lithium ion power battery especially.

Summary of the invention

Purpose of the present invention provides a kind of manufacture method simple for the shortcoming that overcomes above-mentioned prior art with deficiency just, and the internal resistance of cell is little, is fit to the manufacture method of the electric core of jumbo soft package lithium ion power battery, thereby has improved the quality of battery.

The objective of the invention is to realize by following technical proposal:

The manufacture method of soft package lithium ion power battery electricity core is characterized in that it is undertaken by following step:

A) positive plate (3) of n bar equal length, width and thickness is overlapping aligned together, then n positive plate one end is welded on the positive pole ear (1), form the positive plate group;

B) again will with the n bar negative plate of positive plate equal number, the length of the negative plate of n-1 bar (4) and n positive plate wherein, thickness is identical, its width is greater than positive plate width 2-3mm and a length of being longer than the n-1 bar, its length that grows is the long negative plate (6) of electric core width, wrap up with barrier film respectively, and negative plate one end exposes, end sealing in addition, one by one blind end is inserted again and be staggered the arrangement between the pole piece of positive plate group, the negative plate of being longer than n-1 bar length is at skin, the bared end of n negative plate end parcel barrier film is welded on the negative lug (2), forms entire laminations;

C) at last outer field long negative plate folding turnback being close on the positive plate (3) of internal layer, is that electric core width is with entire laminations flattened roll coiled electricity core with conventional method to grow part again.

Wherein the bar number of positive plate and negative plate is the integer of 1-25, and the numerical value of length, width and the n of positive and negative plate and barrier film two can be selected according to battery capacity.

The electric core of Zhi Zuoing is used on the lithium ion battery as stated above, the resistance of positive plate or negative plate, can equivalent original positive plate or negative plate be cut into the parallel connection of isometric n sheet resistor, its parallel resistance is one of n square of former lengthy motion picture resistance, therefore reduce its resistance greatly, be fit to do great-capacity power battery.

Because it is simple to take technique scheme to make the technology of the present invention compared with the prior art have manufacture method, the internal resistance of cell is little, is suitable for the advantage and the effect of big capacity soft package lithium ion power battery electricity core.

Description of drawings

Fig. 1 is the present invention's electricity core deployed configuration schematic diagram,

Fig. 2 is Fig. 1 vertical view,

Fig. 3 is electric core outside drawing,

(1) is positive pole ear among the figure, and (2) are negative lug, and (3) are positive plate, and (4) are negative plate, and (5) are barrier film, and (6) are long negative plate.

Embodiment

Embodiment 1

Make the soft package lithium ion power battery electricity core of a 100Ah, by shown in Figure 1, select 20 positive plates (3) for use, its length is 540mm, width is 196mm, thickness is 0.15mm, overlapping alignment, form the positive plate group, article 20, positive plate one end is welded on the positive pole ear (1), get 20 negative plates again, width is 198mm, thickness is 0.15mm, wherein three negative plates (4) length is 540mm, with three length is 1100mm, width is 200mm, thickness is that the barrier film (5) of 35mm wraps up respectively, and the length of another long negative plate (6) is 620mm, is 1240mm barrier film parcel with a length, above-mentioned 20 negative plate one ends with the barrier film parcel expose, in addition end is sealing, will insert respectively with the diaphragm seals end to be staggered between the anode pole piece of positive plate group and to arrange again, and long negative plate is at skin, at last the 80mm folding turnback that grows is adjacent to the internal layer positive plate, the width of pressing 80mm at last with overlapping good slice, thin piece flattened roll around after, the bared end that again negative plate is not wrapped up barrier film is welded on the negative lug (2), promptly is made into battery battery core.

Embodiment 2

Make the soft package lithium ion power battery electricity core of a 5Ah, by shown in Figure 1, select 1 positive plate (3) for use, its length is 540mm, width is 196mm, thickness is 0.15mm, is the positive plate group, and positive plate one end is welded on the positive pole ear (1), get the long negative plate of bar (6) again, width is 198mm, and thickness is 0.15mm, and length is 620mm, with a length is 1240mm barrier film (5) parcel, long negative plate one end with the barrier film parcel exposes, and end is sealing in addition, and long negative plate is at skin, at last the 80mm folding turnback that grows is adjacent to the internal layer positive plate, the width of pressing 80mm at last with overlapping good slice, thin piece flattened roll around after, the bared end that again negative plate is not wrapped up barrier film is welded on the negative lug (2), promptly is made into battery battery core.

Embodiment 3

Make the soft package lithium ion power battery electricity core of a 20Ah, by shown in Figure 1, select 4 positive plates (3) for use, its length is 540mm, width is 196mm, thickness is 0.15mm, overlapping alignment, form the positive plate group, article 4, positive plate one end is welded on the positive pole ear (1), get 4 negative plates again, the many 199mm of width, thickness is 0.15mm, wherein three negative plates (4) length is 540mm, with three length is 1100mm, width is 200mm, thickness is that the barrier film of 35mm wraps up respectively, and the length of another long negative plate is 620mm, is 1240mm barrier film parcel with a length, above-mentioned 4 negative plate one ends with barrier film (5) parcel expose, in addition end is sealing, will insert respectively with the diaphragm seals end to be staggered between the anode pole piece of positive plate group and to arrange again, and long negative plate is at skin, at last the 80mm folding turnback that grows is adjacent to the internal layer positive plate, the width of pressing 80mm at last with overlapping good slice, thin piece flattened roll around after, the bared end that again negative plate is not wrapped up barrier film is welded on the negative lug (2), promptly is made into battery battery core.

Embodiment 4

Make the soft package lithium ion power battery electricity core of a 250Ah, by shown in Figure 1, select 25 positive plates (3) for use, its length is 1080mm, width is 196mm, thickness is 0.15mm, overlapping alignment, form the positive plate group, article 25, positive plate one end is welded on the positive pole ear (1), get 25 negative plates again, width is 198mm, thickness is 0.15mm, wherein 24 negative plates (4) length is 1080mm, with 24 length is 2200mm, width is 200mm, thickness is that the barrier film (5) of 35mm wraps up respectively, the length of another long negative plate (6) is 1180mm, is 2400mm barrier film parcel with a length, and above-mentioned 25 negative plate one ends with the barrier film parcel expose, end is sealing in addition, to insert respectively with the diaphragm seals end and be staggered the arrangement between the anode pole piece of positive plate group, long negative plate is rolled over turnback with the 100mm that grows at last and is adjacent to the internal layer positive plate at skin, at last by the width of 100mm with overlapping good slice, thin piece flattened roll around after again negative plate is not wrapped up barrier film bared end be welded on the negative lug (2), promptly be made into battery battery core.

Claims

1. the manufacture method of soft package lithium ion power battery electricity core is characterized in that it is undertaken by following step:

B) again will with the n bar negative plate of positive plate equal number, the length of the negative plate of n-1 bar (4) and n positive plate wherein, thickness is identical, its width is greater than positive plate width 2-3mm and a length of being longer than the n-1 bar, its length that grows is the long negative plate (6) of electric core width, use barrier film (5) parcel respectively, and negative plate one end exposes, end sealing in addition, one by one blind end is inserted again and be staggered the arrangement between the pole piece of positive plate group, the long negative plate of being longer than n-1 bar length is at skin, the bared end that n negative plate do not wrap up barrier film is welded on the negative lug (2), forms entire laminations;

2, the manufacture method of battery battery core according to claim 1 is characterized in that the bar of positive plate and negative plate is counted the integer that n is 1-25.